A 2-D Magnetoinductive Wave Device for Freer Wireless Power Transfer

Sandoval, Fralett Suarez; Delgado, Saraí M. Torres; Moazenzadeh, Ali; Wallrabe, Ulrike

doi:10.1109/tpel.2019.2904875

Cited by 22 publications

(15 citation statements)

References 38 publications

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“…When the side-placed NPM slabs are vertical to the system, the ability to propagate magneto-inductive waves (MIWs) has been shown, resulting in the enhancement of the efficiency [23]- [27]. The principle of the side-placed NPM slabs that are vertical to the coils is shown in Fig.…”

Section: Modeling Of the Metamaterials A Principle Of The Metamaterialsmentioning

confidence: 99%

Comprehensive Analysis of Side-Placed Metamaterials in Wireless Power Transfer System

Huang

Xiong

et al. 2020

IEEE Access

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In this paper, we propose the side-placed negative-permeability metamaterial (NPM) and zero-permeability metamaterial (ZPM) in the wireless power transfer (WPT) system to simultaneously enhance the level of efficiency and meet the electromagnetic field (EMF) safety regulations. A theoretical analysis, simulation, and experiment are conducted to verify the feasibility of the proposed system model. Based on the principle of magneto-inductive waves (MIWs) and the shielding theory, the transmission characteristics of the WPT system without and with two NPM slabs, two ZPM slabs, and the combination of NPM and ZPM slabs are analyzed. The results demonstrate that the ZPM slabs and the combination of NPM and ZPM slabs have a high efficiency improvement when the transfer distance is located under 40 cm and exceeds 40 cm, respectively. Both methods can control the EMF leakage. Moreover, the side-placed metamaterial exhibits tolerance to the misalignment of the coil. Finally, comparative studies on the ZPM slab and aluminum are carried out. The experimental and simulation results show that the ZPM slab performs better than aluminum.INDEX TERMS Zero-permeability, negative-permeability, combination, increase efficiency, shield magnetic field, MIW, wireless power transfer (WPT).

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Section: Modeling Of the Metamaterials A Principle Of The Metamaterialsmentioning

confidence: 99%

Comprehensive Analysis of Side-Placed Metamaterials in Wireless Power Transfer System

Huang

Xiong

et al. 2020

IEEE Access

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“…3(a) can be converted to the T-type model, as shown in Fig. 3(b) [18,19]. The circuit input and output currents are expressed in the matrix form in Eq.…”

Section: Circuit Analysis Of Two-coil Wpt Systemmentioning

confidence: 99%

Modeling and Experimental Analysis of Three-Dimensional Cross Coil Structure for Misaligned Wireless Power Transfer System

Song¹,

An²,

Li³

et al. 2020

PIER C

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The coaxiality of the transmitter and receiver has a significant impact on the efficiency in a wireless power transfer system. In order to keep high system efficiency, a novel coil structure is studied in this paper. Several plane coils are crossed to make up a three-dimensional coil structure in the transmitter, which will make sure the system in the state of strong magnetic field coupling. In the theory part, the magnetic field equation of different relationships between transmitter and receiver is deducted in detail. In the simulation part, the performance of the three-dimensional coil structure has been studied. The simulation results show that the new coil structure can generate a rotating magnetic field, and the rotating magnetic field will keep the system in the state of the strong magnetic field coupling in the simulation model. In the experimental part, the three-dimensional coil structure has been compared to a plane coil structure. The experimental results show that the efficiency of the three-dimensional coil structure is increased above 10% in the misalignment situation. The simulated and experimental results show that the new three-dimensional coil structure has a better performance in the misalignment situation than the plane coil structure in a wireless power transfer system.

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“…To solve both efficiency and safety problems, the non-uniform [18] and hybrid MTM/MTS techniques [22] have been proposed, however, these are suitable for the size of transmitting and receiving coils are comparable. Another method is using magnetoinductive wave (MIW), which is supported by MTM/MTS composed of inductively coupled electrically small resonators and created by inter-element couplings [26][27][28][29]. The MIWs can be constructed in one, two and three dimensions.…”

Section: Introductionmentioning

confidence: 99%

“…The MIWs can be constructed in one, two and three dimensions. Usually, however, the efficiency is fluctuation due to the standing MIW, which depends on the receiver position [27]. Moreover, the two-dimension MIWs have more complex dispersion [27,29].…”

Section: Introductionmentioning

confidence: 99%

A Defected Metasurface for Field-Localizing Wireless Power Transfer

Chaimool¹,

Rakluea²,

Zhao³

et al. 2021

Wireless Power Transfer – Recent Development, Applications and New Perspectives

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The potential of wireless power transfer (WPT) has attracted considerable interest for various research and commercial applications for home and industry. Two important topics including transfer efficiency and electromotive force (EMF) leakage are concerned with modern WPT systems. This work presents the defected metasurface for localized WPT to prevent the transfer efficiency degraded by tuning the resonance of only one-unit cell at the certain metasurface (MTS). Localization cavities on the metasurface can be formed in a defected metasurface, thus fields can be confined to the region around a small receiver, which enhances the transfer efficiency and reduces leakage of electromagnetic fields. To create a cavity in MTS, a defected unit cell at the receiving coils’ positions for enhancing the efficiency will be designed, aiming to confine the magnetic field. Results show that the peak efficiency of 1.9% for the case of the free space is improved to 60% when the proposed defected metasurface is applied, which corresponds to 31.2 times enhancements. Therefore, the defected MTS can control the wave propagation in two-dimensional of WPT system.

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A 2-D Magnetoinductive Wave Device for Freer Wireless Power Transfer

Cited by 22 publications

References 38 publications

Comprehensive Analysis of Side-Placed Metamaterials in Wireless Power Transfer System

Comprehensive Analysis of Side-Placed Metamaterials in Wireless Power Transfer System

Modeling and Experimental Analysis of Three-Dimensional Cross Coil Structure for Misaligned Wireless Power Transfer System

A Defected Metasurface for Field-Localizing Wireless Power Transfer

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